---
title: Query multiple indices or clusters with ES|QL
description: ES|QL allows you to query across multiple indices, clusters, and projects, and combine data from multiple sources. Learn more in the following sections:...
url: https://docs-v3-preview.elastic.dev/elastic/elasticsearch/pull/144300/reference/query-languages/esql/esql-multi
products:
  - Elasticsearch
applies_to:
  - Elastic Cloud Serverless: Generally available
  - Elastic Stack: Generally available
---

# Query multiple indices or clusters with ES|QL
ES|QL allows you to query across multiple indices, clusters, and projects, and combine
data from multiple sources. Learn more in the following sections:
- [Query multiple indices](https://docs-v3-preview.elastic.dev/elastic/elasticsearch/pull/144300/reference/query-languages/esql/esql-multi-index)
- [Query across clusters](https://docs-v3-preview.elastic.dev/elastic/elasticsearch/pull/144300/reference/query-languages/esql/esql-cross-clusters)
- [Query across Serverless projects](https://docs-v3-preview.elastic.dev/elastic/elasticsearch/pull/144300/reference/query-languages/esql/esql-cross-serverless-projects) <applies-to>Elastic Cloud Serverless: Preview</applies-to>
- [Combine result sets with subqueries](https://docs-v3-preview.elastic.dev/elastic/elasticsearch/pull/144300/reference/query-languages/esql/esql-subquery)